Scraping and pulverizing attachment for disk harrows.



J. E. ERB. SGRAPING AND PULVERIZING ATTACHMENT FOR DISK HARROWS.

APPLIOATION FILED 001218, 1911. I

entor Wntnesses 1 I COLUMBIA PLANOGRAPH -8C)., WASHINGTON Patented July'16, 1912.

,fZZIZWZ 4 Attorneys.

' UNITED STATES PATENT OFFICE.

JACOB E. ERB, F RYDER, NORTH DAKOTA.

SCRAPING AND PULVERIZING ATTACHMENT FOR DISK HARROWS.

To all whom it may concern:

Be it known that I, JACOB E. Ems, a citizen of the United States,residing at Ryder, in the county of Ward and State of North Dakota, haveinvented a new and useful Scraping and Pulverizing Attachment for DiskHarrows, of which the following is a specification.

This invention relates to scraping and pulverizing attachments for diskharrows and its object is to provide a device of this character whichcan be applied readily to an ordinary type of harrow and which iscapable of flexing in a plane parallel with the surface over which it isdrawn but cannot flex upwardly or downwardly.

A further object is to provide a combined scraper and pulverizerflexible from end to end but having a continuous lower or working edgefor engagement with the soil, all portions of said edge being located inthe same plane.

lVith the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed can be made within thescope of what is claimed, without departing from the spirit of theinvention.

In the accompanying drawings the preferred form of the invention hasbeen shown.

In said drawings :Figure 1 is a plan view of a disk harrow having thepresent improvements combined therewith. Fig. 2 is a section on line A-BFig.1. Fig. 3 is an enlarged perspective view of a portion of thescraper. Fig. 4 is a similar view showing a portion of av modified formof scraper.

Referring to the figures by characters of reference A designates aharrow structure and extending rearwardly therefronr are brackets a inwhich is mounted a rod or tube 1 having rearwardly and-downwardlyextending arms 2 at the ends thereof and supported beyond the sides ofthe harrow structure. Each of these arms is pivotally connected, at itslower end, to a yoke 3 and the two yokes are, in turn, pivotallyconnected to the end portions of the flexible scraper and pulverizerindicated generally at 4. As shown particularly in Fig. 3, the

Specification of Letters Patent.

Application filed October 18, 1911.

Patented July 16, 1912.

Serial No. 655,328.

said scraper and'pulverizer ismade up of an elongated strip including aseries of similar links each of which is substantially U- shaped and hasa lug 5 upon the crown or intermediate portion thereof for the receptionof a pivot pin 6. The lug 5 is adapted to project between the arms 7 ofthe next adjoining link and the pivot device 6 extends through thesearms and the lug and thus serves to hold the links together so that thechain is free to flex about the axes of the pins 6 but in no otherdirection. Thus it will be seen that when the flexible element 4 is incontact with the ground and is drawn thereover, the lower edge thereof,Will lie with all portions thereof in the same plane. This lower edgeextends practically continuously throughout the length of the element 4and the only possible up and down movement of the said element 4relative to the structure A is that permitted by reason of the pivotalconnections between the yokes 3 and the arms 2.

Instead of forming the element 4 of U- shaped links, such as shown inFig. 3, the said element can be made up of plates 8, as shown in Fig. 4,each plate having spaced eyes 9 at one end and a single central eye 10at its other end, the eyes 10 being adapted to fit between the eyes 9and the alining eyes beingarranged to receive pivot pins 11.

It will be apparent that with either form of scraping element described,the surface over which said element is drawn will be properly smoothedand the loosened soil pulverized. By providing an element 4 which canonly flex in one plane the rolling action obtained by the use of anordinary chain is avoided and more eflicient results are thus obtained.

lVhat is claimed is 1. A scraping and pulverizing attachment for harrowsand the like, including a flexible soil engaging element made up ofnonflexible soil engaging members placed end to end said elementhavingall parts of its lower or working edge constantly in the samesubstantially horizontal plane.

2. An attachment for agricultural machines, including a scraper capableof flexing only in a substantially horizontal plane, said scraper beingmade up of a plurality of non-flexible pivotally connected members.

3. The combination with a harrow and brackets extending therefrom, ofacross bar supported by the brackets, rearwardly extending arms upon thebar, yokes pivotally connected to the arms and adapted to swing upwardlyand downwardly relative thereto and a flexible scraper 'pivotallyconnected at its ends to the yokes, said scraper being made up ofsimilar links mounted to swing about parallel axes, the working edge ofthe scraper being continuous and having all portions thereof constantlydisposed in the 10 same plane.

In testimony that I claim the foregoing as my own, I have hereto aflixedmy signa ture in the presence of two witnesse JACOB E. EBB. Witnesses B.A. DICKINSON, D. H. JENSEN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

